JPH09239521A - Cleaning device of casting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the treatment cost by achieving the sand blasting using the sand generated in the shake-out process in finishing a casting made of light alloy to eliminate the shot blast process. SOLUTION: A casting cast in a casting process A of the manufacturing line is roughly deburred B by a press to remove burrs of an opening part. Then, the casting is loaded on an oscillation table, and excited by a knock-out machine to perform the shake-out C. After the shake-out, the sand blast treatment I is achieved to remove the baked casting sand and to improve the quality of the casting surface. A runner is cut and removed D by a round saw, and the full deburring is achieved by milling. The casting sand generated in the shake-out C is sieved in the sand blast treatment in the process so that the grain size of the sand is constant, e.g. <=22 mesh, and appropriate blasting effect can be obtained with the blast air pressure of 15.5kg/cm<2> .

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting cleaning apparatus for performing finishing treatment such as sand removal after casting.

[0001]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a cylinder head of an automobile engine is manufactured by casting A, rough deburring B, sand removing C by a knockout machine, cutting and removing D of a feeder, and deburring E. , Shot blasting F, visual inspection G, and shipping H.

When a cylinder head is cast in a casting step A, rough deburring B is performed. This is to remove burrs appearing in the opening of the cylinder head cast in the mold by a press machine. This deburring removes sand C in the next step, and the head intake which is the opening is removed. Makes it easy for sand to come out from the mouth, etc.

After rough deburring B, sand removal C is performed by a knockout machine. In this method, the rough deburred work is placed on a vibrating table, and the core is collapsed by applying vibration to separate core sand from the cylinder head.

After separation, the riser is cut and removed. This feeder has a large thickness to improve the molten metal replenishment property and cannot be sheared by a press machine. For this reason, it is cut off with a circular saw while applying cutting oil.

Next, in the main deburring step E, burrs in the mold matching portion are removed by milling.

In the shot blasting step F, shot balls such as zinc balls are blown onto the cylinder head by air pressure or projected by an impeller. By this step, the sand burned on the cylinder head is removed, the surface quality is improved, the remaining sand is prevented from jumping into the combustion chamber, and the wall resistance of the air is reduced.

After this, after a visual inspection G, the product is shipped H.

[0008]

The shot blasting step F is performed in a wet state with the cutting oil used in the cutting and removing step D of the riser which is the previous step. For this reason, shot balls, which are abrasives, are easily attached to the wet cylinder head, and cleaning work for removing the shot balls after shot blasting is required. Specifically, this work is a work of dropping a shot ball by air blowing with a gun type air nozzle.

This shot ball is supposed to be reused,
If it is used repeatedly, it will be chipped and will need to be replaced. In addition, it will be costly because a recovery mechanism must be provided.

Further, wet shot balls may be clogged and clogged in the recovery mechanism, which has been a cause of lowering work efficiency.

Further, the shot blasting equipment is an equipment which generates dust and noise similarly to a knockout machine for removing sand. However, in the above-mentioned conventional processing procedure, since each processing is performed at a remote place, each of them is carried out. It is necessary to install a dust collection facility and a soundproof cabinet independently. For this reason,
It was disadvantageous in terms of equipment cost.

[0012] Therefore, an object of the present invention is to provide a facility for eliminating the cost increase due to the use of shot balls and being able to simultaneously take measures against dust and noise at one place.

[0013]

A casting cleaning apparatus provided by the present invention is an apparatus provided in a line for separating a casting from a casting mold and finishing after casting.

A castout taken out after pouring is placed, a core is disintegrated by vibration and a core sand is separated, and a sandblasting treatment is provided to the separated casting provided in the next stage of the knockout machine. A sand blasting device to perform, a sand recovery conveyor provided below the knockout machine to recover the sand generated by the collapse of the core, and the sand sent from the sand recovery conveyor to receive the sand sent from the sand recovery conveyor and separate the sand having a certain size or less by a vibrating sieve. And a sand supply device for supplying the sandblasting device,

The present invention is characterized by comprising a dust collecting device, and a soundproof cabinet for accommodating the knockout machine, the sandblasting device, the sand collecting conveyor, and the sand supplying device in the same space.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention eliminates the shot blasting step F that was performed after the deburring step E in the conventional equipment shown in FIG. 4, and the work performed here is shown in FIG. Immediately after the sand removing step C, the sand blasting step I is newly provided. As the sand used in this newly provided sandblasting step I, as shown in FIG. 2, the sand discharged in the preceding sand removal step C is used. In the processing procedure of the present invention, since the sand removing step C and the sand blasting step I, which are noise sources and dust generating sources, can be concentrated in one place, the soundproof cabinet 1 equipped with the dust collecting device is installed in these steps C and I. It will be installed as a shared facility.

First, all steps shown in FIG. 1 will be described. In the casting step A, when the cylinder head is cast by pouring hot water into the mold, rough deburring B is performed by a press machine to remove burrs in the openings such as the intake port. Next, the casting is placed on a vibration table, and vibration is applied by a knockout machine to remove sand C.

Immediately after the sand removal, sand blasting treatment I is performed to remove the casting sand sticking to the cylinder head, and at the same time, improve the surface quality by reducing the air resistance on the wall surface of the intake and exhaust holes. Since this sandblasting is performed on the dry cylinder head, sand does not adhere to the cylinder head.

Further, in this sandblasting step I, the work jig for holding the work can be improved by using the work jig used in the sand removing step of the previous step as it is without the work of transloading the work. .

Next, while the cutting oil is being applied, the riser is cut and removed D from the cylinder head with a circular saw, and the main deburring step E is performed.
Then, the burrs in the mold matching portion are removed by milling.

After this, a visual inspection G is carried out, and the product is shipped H.

The characteristic part of the present invention will be further described. As shown in FIG. 2, the newly installed sandblasting device I is continuously provided immediately after the sand removing step C on the transport line. A sand recovery conveyor 4 is installed below the knockout machine 2 for sand removal and the sandblasting device 3, and recovers the sand generated by the collapse of the core and the sand discharged by the sandblasting. The sand thus recovered is sent to the sand supply device 5, and the sand having a certain particle size or less is sieved off and supplied to the sandblasting device 3. The knockout machine 2 and the sandblasting device 3 are housed in one soundproof cabinet 1 equipped with a dustproof device.

FIG. 3 shows a concrete configuration example of the sandblasting device 3 and the sand supplying device 5.

In FIG. 3, the sandblasting device 3 is
Hold the blowing nozzle 3a whose tip is split into two left and right,
The sand supplied from the sand supply device 5 is blown onto the work on the conveyor by compressed air supplied from an air compressor (not shown). The blowing nozzle 3a of the sandblasting device 3 is provided with shutter devices 6 and 7 for adjusting the blowing amount at the base and the branching position. The shutter device 6 at the base is moved by the first cylinder 8 to adjust the amount of sand released to the side discharge pipe 9 to adjust the strength of sandblast. Shutter device 7 at branch part
Moves the second cylinder 10 to adjust the proportion of sand that is divided into left and right to adjust the left and right strength of the sandblast.

The sand supply device 5 has a compression spring 1 at the bottom.
1, a mesh 12 for sieving which divides the internal space into upper and lower parts is provided inside the box body 12 which is supported by 1 and can vibrate.
2 is provided with a vibrating body 14 for applying vibration in the tilt direction. The sand thrown into the loading port of the box 12 from the extension part 4a of the sand recovery conveyor is slanted by the vibration of the box 12 to the discharge side, and the sand having the predetermined particle size or less is sieved off by the mesh 13. And supplied to the sandblasting device 3. The sand having a large grain size and not sieved by the mesh 13 is discharged from the discharge port 15 through the chute 16 by the sand discharge conveyor 17.

The reason for sieving in this way is to obtain a uniform sandblasting effect by limiting the particle size of sand to a certain value or less. The particle size is limited to, for example, 22 mesh or less, and the sandblast air pressure is set to 5.5.
When it is set to kg / cm ² , an appropriate sandblast effect can be obtained.

In the above description, the cylinder head of an automobile engine is used as an example of the finishing treatment, but the present invention is applicable to all casting products which are subjected to finishing treatment including sand removal and surface treatment after casting. On the other hand, it can be implemented.

[0028]

INDUSTRIAL APPLICABILITY The present invention does not use a dedicated material such as a shot ball as a polishing / cleaning material, but uses sand generated by collapsing the core in the previous step as the polishing / cleaning material. It is not necessary to provide a recovery mechanism for the above, and it is not necessary to supply a dedicated material such as shot balls, so that the processing cost can be reduced.

Further, before the cutting of the feeder, sand blasting is performed to remove the burned sand and improve the surface quality, so that the sand as the abrasive cleaning agent does not get wet with the cutting oil used for cutting the feeder and the sand It is possible to improve workability without adhering to the casting and solidifying sand.

In particular, since the sand removing device and the sand blasting device, which are the noise source and the dust generating source, can be centrally provided in one place, the soundproof cabinet equipped with the dust collecting device can be integrated into one to reduce the equipment cost. Reduction can be achieved.

[Brief description of drawings]

FIG. 1 is a flowchart showing steps of a finishing process using a casting cleaning apparatus of the present invention.

FIG. 2 is a flowchart illustrating a sand removing process and a sandblasting process in FIG.

FIG. 3 is a front view showing a configuration example of a sandblasting device and a sand collecting device used in the present invention.

FIG. 4 is a flowchart showing a conventional procedure for finishing a casting.

[Explanation of symbols]

 A casting process B sand removal process D feeder cutting process E main deburring process G visual inspection process H shipping process I sandblasting process 1 soundproof cabinet with dust collector 2 knockout machine 3 sandblasting device 3a blowing nozzle 4 sand recovery conveyor 5 Sand supply device 6,7 Shutter 8,10 Cylinder 11 Compression spring 12 Box body 13 Mesh 14 Vibrating body

Claims (1)

[Claims] 1. A device provided in a line for finishing after separating the core, design part, etc. from the casting after casting, wherein the casting taken out after pouring is placed and the core is collapsed by vibration. A knockout machine for separating the core sand, a sandblasting device provided in the next stage of the knockout machine for sandblasting the separated casting, and a sandblasting device provided below the knockout machine, which is caused by the collapse of the core. A sand recovery conveyor for recovering sand, a sand supply device for receiving the sand sent from the sand recovery conveyor, separating sand of a certain particle size or less by a vibrating sieve, and supplying the sand blasting device, and a dust collector, A soundproof cabinet that houses the knockout machine, sandblasting device, sand recovery conveyor, and sand supply device in the same space. Cleaning apparatus of the casting, characterized in that the.